Since it suppresses breathing much less than most other available anesthetics,[33] ketamine is used in medicine as an anesthetic; however, due to the hallucinations it may cause, it is not typically used as a primary anesthetic, although it is the anesthetic of choice when reliable ventilation equipment is not available.

The effect of ketamine on the respiratory and circulatory systems is different from that of other anesthetics. When used at anesthetic doses, it will usually stimulate rather than depress the circulatory system.[39] It is sometimes possible to perform ketamine anesthesia without protective measures to the airways.[citation needed] Ketamine is considered relatively safe because protective airway reflexes are preserved.[40]

Ketamine is used as a bronchodilator in the treatment of severe asthma.[41] However, evidence of clinical benefit is limited…Read More